Domestication method for microorganisms for performing purification treatment on cold-rolling organic wastewater

Abstract

The invention discloses a domestication method for microorganisms for performing purification treatment on cold-rolling organic wastewater. The domestication method comprises the following steps: step S1, injecting clean water into a biological contact oxidation tank, starting aeration, and feeding a strain and a nutritional agent; step S2, continuously culturing the strain for one week to ensure that aerobic microorganisms are gradually reproduced until successfully forming a bio-film; step S3, adding the cold-rolling organic wastewater into the biological contact oxidation tank, and stopping feeding water until the color of water in the biological contact oxidation tank is changed into green brown from yellow brown; step S4, increasing the aeration amount to perform stuffy aeration culture; step S5, gradually increasing the water feeding load, and continuously repeating the process from the step S3 to the step S4 until the water feeding load exceeds 300% of the design load to successfully domesticate the aerobic microorganisms. According to the domestication method disclosed by the invention, the cultured and domesticated aerobic microorganisms can have stronger vitality and higher capacities of degrading organic matters in the wastewater after generating variations so as to ensure that the cold-rolling high-concentration organic wastewater can be treated and can meet the discharge standards, and the running cost can be greatly reduced.

Description

technical field [0001] The invention relates to the technical field of industrial sewage purification treatment, in particular to a method for acclimating microorganisms used to purify and treat cold rolling organic wastewater. Background technique [0002] The characteristics of high-concentration organic wastewater produced in the production process of cold rolling mills are as follows: 1. There are many types of wastewater, mainly including oily wastewater, emulsion wastewater, skinning wastewater, and alkali-containing wastewater. 2. Not only are there many types, but also the amount of each type of wastewater is the largest compared with similar wastewater produced by other parts of the steel plant. 3. Its composition is complex. Wastewater mainly contains suspended solids 600-2000mg / L, animal and vegetable oil and mineral oil about 1000mg / L, emulsion 20000-100000mg / L, finishing liquid about 50000mg / L, COD20000-50000, etc. 4. The waste water changes greatly. Due to the...

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Problems solved by technology

3. Its composition is complex. Wastewater mainly contains suspended matter 600-2000mg / L, animal and vegetable oil and mineral oil about 1000mg / L, emulsion 20000-100000mg / L, finishing liquid about 50000mg / L, COD20000-50000, etc.

4. The waste water changes greatly. Due to the difference in the output, production capacity and operating rate of each unit in the cold rolling mill, the volume and composition of the cold rolling waste water fluctuate greatly; 5. The treatment is difficult. With the increasing requirements of various industries for cold rolled plates In addition to the improvement of the cold rolling process for the products of the cold rolling mill, in recent years, many large enterprises at home and abroad have carried out a lot of reforms in the surface treatment technology.

Due to the above characteristics of cold rolling wastewater, it is very easy to cause impact on aerobic microorganisms, causing dormancy and death of aerobic microorganisms, resulting in substandard effluent, and even paralysis of the biochemical system, so that it is necessary to re-cultivate and domesticate the bacteria, and the time for the domestication of the bacteria It usually takes more than 2 weeks, which affects the normal production of the enterprise, so it is necessary to domesticate an aerobic microorganism that can treat high-concentration organic wastewater from cold rolling

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